Christopher Dorner

In February 2013, Christopher Dorner embarked on a personal vendetta against law enforcement. A former Los Angeles police officer, Navy officer and expert marksman, Dorner had been fired after falsely accusing a fellow police officer of kicking an arrestee.

Unsuccessful appeals and burgeoning frustration may have prompted Dorner to turn to social media, where in February 2013 he posted detailed accusations against the police department and members of the media -- and then went on a shooting spree. Dorner staged a series of attacks on police officers and their families, killing four people and wounding three others. The ensuing manhunt spread across California and into Mexico, lasted nearly two weeks and became one of the largest searches for a fugitive in LAPD history.

Dorner taunted police that they wouldn't be able to find him as he knew all their techniques. But they eventually cornered him in an isolated mountain cabin, where despite tear gas and a fire that caused ammunition to explode, he died of a self-inflicted gunshot wound [sources: Carlsbad Current-Argus, Ford, Tomlinson].